What is the difference between Oracle Virtual Private Database and Oracle Label Security?
Oracle Virtual Private Database (VPD) is provided at no additional cost with the Enterprise Edition of Oracle Database. Oracle Label Security is an add-on security option for the Oracle Database Enterprise Edition. Oracle VPD is a term used for several powerful security features like, fine grained access control (FGAC), application context and global application context. VPD policies are written using PL/SQL, and can be assigned to an individual table or view. An information request, that accesses a table or view protected by VPD, is modified according to the policy assigned to the table or view. VPD policies can be as simple as enforcing access during business hours. VPD policies can restrict access by comparing the value of an attribute in an individual row with an application context value. Global application context allows an application context to be accessed across multiple database sessions, reducing or eliminating the need to create a separate application context for each user
